From 4ba8614c006f9828f0796c140bc3e13c9e67938c Mon Sep 17 00:00:00 2001 From: Yuval Adam Date: Mon, 29 Oct 2012 23:06:01 +0200 Subject: Added utils --- utils/sine.h | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 utils/sine.h (limited to 'utils/sine.h') diff --git a/utils/sine.h b/utils/sine.h new file mode 100644 index 0000000..9c91255 --- /dev/null +++ b/utils/sine.h @@ -0,0 +1,85 @@ +//***************************************************************************** +// +// sine.h - Prototypes for the fixed point sine trigonometric function. +// +// Copyright (c) 2006-2012 Texas Instruments Incorporated. All rights reserved. +// Software License Agreement +// +// Texas Instruments (TI) is supplying this software for use solely and +// exclusively on TI's microcontroller products. The software is owned by +// TI and/or its suppliers, and is protected under applicable copyright +// laws. You may not combine this software with "viral" open-source +// software in order to form a larger program. +// +// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS. +// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT +// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY +// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL +// DAMAGES, FOR ANY REASON WHATSOEVER. +// +// This is part of revision 9453 of the Stellaris Firmware Development Package. +// +//***************************************************************************** + +#ifndef __SINE_H__ +#define __SINE_H__ + +//***************************************************************************** +// +// If building with a C++ compiler, make all of the definitions in this header +// have a C binding. +// +//***************************************************************************** +#ifdef __cplusplus +extern "C" +{ +#endif + +//***************************************************************************** +// +//! \addtogroup sine_api +//! @{ +// +//***************************************************************************** + +//***************************************************************************** +// +//! Computes an approximation of the cosine of the input angle. +//! +//! \param ulAngle is an angle expressed as a 0.32 fixed-point value that is +//! the percentage of the way around a circle. +//! +//! This function computes the cosine for the given input angle. The angle is +//! specified in 0.32 fixed point format, and is therefore always between 0 and +//! 360 degrees, inclusive of 0 and exclusive of 360. +//! +//! \return Returns the cosine of the angle, in 16.16 fixed point format. +// +//***************************************************************************** +#define cosine(ulAngle) sine((ulAngle + 0x40000000)) + +//***************************************************************************** +// +// Close the Doxygen group. +//! @} +// +//***************************************************************************** + +//***************************************************************************** +// +// Prototype for the fixed point sine function. +// +//***************************************************************************** +extern long sine(unsigned long ulAngle); + +//***************************************************************************** +// +// Mark the end of the C bindings section for C++ compilers. +// +//***************************************************************************** +#ifdef __cplusplus +} +#endif + +#endif // __SINE_H__ -- cgit v1.3.1